// JavaScript Document

/*
* SB 19/06/09
* Checking email address field and its format if correct then return true else return false
*/
function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){		  
			changeText("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){		  
			changeText("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){		   
			changeText("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){		   
			changeText("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){		    
			changeText("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){		   
			changeText("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(" ")!=-1){		    
			changeText("Invalid E-mail ID")
		    return false
		 }

 		 return true
	}

/*
 * SB 19/06/09
 * Check form text fields for example email address  
 */
function ValidateForm(){
	var emailID=document.frmSample.txtEmail

	if ((emailID.value==null)||(emailID.value=="")){	
		changeText("Please Enter your Email ID")
		emailID.focus()
		return false
	}
	if (echeck(emailID.value)==false){
		emailID.value=""
		emailID.focus()
		return false
	}
	return true
 }

/*
 * SB 19/06/09
 * Display the error message
 */
function changeText(str){
	var oldHTML = str;
	var newHTML = "<error_colour>" + oldHTML + "</error_colour>";

	document.getElementById('errorMessage').innerHTML = newHTML;
}