/**
 *@author bobby hagan
 *@MDW Tech Support
 *@param String text
 *This function hyperlinks a substring of text  that begins "www."  and
 * ends with ".com", ".org", ".gov", ".edu", or ".net"
 *@return result the processed string
 */
function hyperLinkWww(text, keyword){
	var temp = text;
	var result = "";
	var keyFlag =0;
	var uHTMLLink;
	cRegExp = /\.com/gi;
	oRegExp = /\.org/gi;
	gRegExp = /\.gov/gi;
	eRegExp =  /\.edu/gi;
	nRegExp =  /\.net/gi;
	var wRegExp;
	
	if(keyword == "www."){
		wRegExp = /www/gi;
		temp=temp.replace(/(<([^>]+)>)/ig,'');
		}
	else{
		wRegExp = /www\./gi;
		}
	var wIndex = temp.search(wRegExp);
	var comIndex;
	var dns;	
		
		if(temp.search(cRegExp) != -1){
			comIndex = temp.indexOf(".com",wIndex );
				
			}
			
		if(temp.search(oRegExp) != -1){
				comIndex = temp.indexOf(".org",wIndex );
				
			}
			
		if(temp.search(gRegExp) != -1){
				comIndex = temp.indexOf(".gov",wIndex );
				
			}
		
		if(temp.search(eRegExp) != -1){
				comIndex = temp.indexOf(".edu",wIndex );
				
			}
			
		if(temp.search(nRegExp) != -1){
				comIndex = temp.indexOf(".net",wIndex );
				
					
		}

		

	/*
	if(comIndex < wIndex){
		comIndex = temp.indexOf(dns, comIndex + 4);
		}*/
	//alert(comIndex)
	comIndex = comIndex + 4;
	var uLink = temp.slice(wIndex, comIndex);
	
	//check for keyword
		if(keyword != ""){
			if(uLink.search(keyword) != -1){
				uHTMLLink = uLink;
				keyFlag = 1;
				//strip html tags
				uLink = uLink.replace(/(<([^>]+)>)/ig,'');
			}
				
		}
		
	newLink = "<a href ='http://" + uLink + "' target='_blank'>"+ uLink + "</a>";
	
	if(keyFlag==1){
		var uRegExp = new RegExp(uHTMLLink, "gi");
		}
	else{var uRegExp = new RegExp(uLink, "gi");}

	result = temp.replace(uRegExp, newLink);
	//alert(result)
	return result;

}
/**
 *@author bobby hagan
 *@MDW Tech Support
 *@param String text
 *This function hyperlinks a vaild email address
 *@return result the processed string
 */
function hyperLinkEmail(text, keyword){
	var temp = text;
	var result = "";
	var keyFlag =0;
	var uHTMLLink;
	var uLink;
	
	cRegExp = /\.com/gi;
	oRegExp = /\.org/gi;
	gRegExp = /\.gov/gi;
	eRegExp =  /\.edu/gi;
	nRegExp =  /\.net/gi;
	
	
	aRegExp = new RegExp("@.*\.[a-z]{3}", "gi");
	var aIndex = temp.search(aRegExp);
	//alert(aIndex);
	var comIndex = temp.indexOf(".com", aIndex);
	var netIndex = temp.indexOf(".net", aIndex);
	var govIndex = temp.indexOf(".gov", aIndex);
	var orgIndex = temp.indexOf(".org", aIndex);
	var eduIndex = temp.indexOf(".edu", aIndex);
	
	var startIndex;
	//find the index of first char in email address
	for(i  = aIndex; i >=0; i--){
		if( temp.charAt(i) == " "){
			startIndex = i + 1;
			break;
			}
		}

	if (comIndex != -1){

		uLink = temp.slice(startIndex, comIndex+4);
		
	}

	if (netIndex != -1){
		uLink = temp.slice(startIndex, netIndex+4);
		
	}
	
	if (govIndex != -1){
		uLink = temp.slice(startIndex, govIndex+4);
		
	}
	
	if (orgIndex != -1){
		uLink = temp.slice(startIndex, orgIndex+4);
		
	}
	
	if (eduIndex != -1){
		uLink = temp.slice(startIndex, eduIndex+4);
		
	}
	
	
	
	//check for keyword
		
		if(uLink.search(keyword) != -1){
			uHTMLLink = uLink;
			keyFlag = 1;
			//strip html tags
			uLink = uLink.replace(/(<([^>]+)>)/ig,'');
			
		}
	
	newLink = "<a href ='mailto:" + uLink + "'>"+ uLink + "</a>";
	var uRegExp;
	if(keyFlag==1){
		uRegExp = new RegExp(uHTMLLink, "gi");
		}
	else{
	
	uRegExp = new RegExp(uLink, "gi");}
	
	
	result = temp.replace(uRegExp, newLink);
	
	return result;

}
/**
 *@author bobby hagan
 *@MDW Tech Support
 *@param String text
 *This function hyperlinks a substring of text that begins "http://."  and
 * ends with ".com", ".org", ".gov", ".edu", or ".net"
 *@return result the processed string
 */
function hyperLinkHttp(text, keyword){
	var temp = text;
	var result = "";
	var keyFlag =0;
	var uHTMLLink;
	cRegExp = /\.com/gi;
	oRegExp = /\.org/gi;
	gRegExp = /\.gov/gi;
	eRegExp =  /\.edu/gi;
	nRegExp =  /\.net/gi;
	
	hRegExp = new RegExp("http://", "gi");
	var hIndex = temp.search(hRegExp);
	var comIndex;
	var dns;
	
			if(temp.search(cRegExp) != -1){
				comIndex = temp.search(cRegExp);
					dns = ".com"
				}
				
			if(temp.search(oRegExp) != -1){
					comIndex = temp.search(oRegExp);
					dns = ".org"
				}
				
			if(temp.search(gRegExp) != -1){
					comIndex = temp.search(gRegExp);
					dns = ".gov"
				}
			
			if(temp.search(eRegExp) != -1){
					comIndex = temp.search(eRegExp);
					dns = ".edu"
				}
				
			if(temp.search(nRegExp) != -1){
					comIndex = temp.search(nRegExp);
					dns = ".net"
						
		}
		
		
	if(comIndex < wIndex){
				comIndex = temp.indexOf(dns, comIndex + 4);
		}
	comIndex = comIndex + 4;
	uLink = temp.slice(hIndex, comIndex);
	
	//check for keyword
	
	if(uLink.search(keyword) != -1){
		uHTMLLink = uLink;
		keyFlag = 1;
		//strip html tags
		uLink = uLink.replace(/(<([^>]+)>)/ig,'');
		
		}
	
	newLink = "<a href ='" + uLink + "' target='_blank'>" + uLink + "</a>";
	
	if(keyFlag==1){
	var uRegExp = new RegExp(uHTMLLink, "gi");
	}
	else{var uRegExp = new RegExp(uLink, "gi");}
	
	
	result = temp.replace(uRegExp, newLink);

	return result;



}
/**
 *@author bobby hagan
 *@MDW Tech Support
 *@param String text
 *This function hyperlinks a substring of text that begins "http://."  and
 * ends with ".com", a substring that begins with "www." and ends with ".com" , ".org", ".gov", ".edu", or ".net". and
 *a valid email address
 *@return result the processed string
 */

function hyperLink(text,keyword){
	
	var result = text;
	
	hRegExp = new RegExp("http://", "gi");
	wRegExp = new RegExp("www.","gi");
	aHRegExp = new RegExp("<a href=", "gi");
	emailRegExp = new RegExp("@.*\.[a-z]{3}", "gi");
	eIndex = result.search(emailRegExp);
	mailExp = new RegExp("mailto:", "gi");
	cmailRegExp = /\.com/gi;
	nmailRegExp = /\.net/gi;
	omailRegExp = /\.org/gi;
	gmailRegExp = /\.gov/gi;
	edumailRegExp = /\.edu/gi;

	
	if(result.search(aHRegExp) == -1 && result.search(hRegExp) != -1){
	
			result = hyperLinkHttp(result, keyword);
	}
	
	
	
	if(result.search(aHRegExp) == -1 && result.search(hRegExp) == -1 && result.search(wRegExp) != -1 ){
				
				result = hyperLinkWww(result, keyword);
	}
	
	
	if(result.search(mailExp) == -1 && result.search(emailRegExp) != -1 &&  ((result.indexOf(".com", eIndex) != -1 && result.indexOf(".com", eIndex) > result.search(emailRegExp)) || (result.indexOf(".net", eIndex) != -1 && result.indexOf(".net", eIndex) > result.search(emailRegExp)) ||( result.indexOf(".org", eIndex) != -1 && result.indexOf(".org", eIndex) > result.search(emailRegExp)) || (result.indexOf(".gov", eIndex) != -1 && result.indexOf(".gov", eIndex) > result.search(emailRegExp)) || (result.indexOf(".edu", eIndex) != -1 && result.indexOf(".edu", eIndex) > result.search(emailRegExp))) ){
						
						result = hyperLinkEmail(result, keyword);
	}
	
	
	
	return result;

}