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 E-mail Address");
	   return false;
	}
	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
	   alert("Invalid E-mail Address");
	   return false;
	}
	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
	    alert("Invalid E-mail Address");
	    return false;
	}
	if (str.indexOf(at,(lat+1))!=-1){
	   alert("Invalid E-mail Address");
	   return false;
	}
	if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
	   alert("Invalid E-mail Address");
	   return false;
	}
	if (str.indexOf(dot,(lat+2))==-1){
	   alert("Invalid E-mail Address");
	   return false;
	}
	if (str.indexOf(" ")!=-1){
	   alert("Invalid E-mail Address");
	   return false;
	}

	return true;					
}

function validate_estimate(){

	if((document.estimate.name.value == "")||(document.estimate.email.value == "")){
		alert("You have not entered all of the required information");
		return false;
	}
	
	if (echeck(document.estimate.email.value)==false){
		return false
	}	
	
	return true;

}

function validate_enquiry(){

	if(document.contact.name.value == ""){
		alert("You have not entered all of the required information");
		return false;
	}
	
	if(document.contact.email.value == ""){
		if (echeck(document.contact.email.value)==false){
			return false
		}	
	}
	
	return true;

}

function validate_link_request(){

	if((document.request.category.value == "")||(document.request.company.value == "")||(document.request.website_title.value == "")(document.request.url.value == "")||(document.request.url_link.value == "")){
		alert("You have not entered all of the required information");
		return false;
	}
	
	if (echeck(document.contact.email.value)==false){
		return false
	}	
	
	
	return true;

}