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){
		   alert("Invalid email address")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Invalid email address")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Invalid email address")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid email address")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid email address")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid email address")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Invalid email address")
		    return false
		 }

 		 return true;					
	}
	
function requestchek()
	{
	
	if ((document.contactform.name.value==null)||(document.contactform.name.value=="")){
		alert("Please enter your name");
		document.contactform.name.focus();
		return false;
	}
	
	 if ((document.contactform.email.value==null)||(document.contactform.email.value=="")){
		alert("Please enter your email address");
		document.contactform.email.focus();
		return false;
	}
	
	if (echeck(document.contactform.email.value)==false){
		document.contactform.email.value="" ;
		document.contactform.email.focus();
		return false;
	}
		
	if ((document.contactform.phone.value==null)||(document.contactform.phone.value=="")){
		alert("Please enter your phone");
		document.contactform.phone.focus();
		return false;
	}
    if ((document.contactform.comments.value==null)||(document.contactform.comments.value=="")){
		alert("Please enter your street address");
		document.contactform.comments.focus();
		return false;
	}
 	
 else
		return true;
 }