function diff(att){
	if(att=='x'){
		if(document.all){
			formx=document.all.tags("form");
		}else if(document.getElementsByTagName){
			formx=document.getElementsByTagName("form");
		}else if(document.layers){
			formx=document.layers("form");
		}
	
		for(var i=0; i<formx.length; i++){
			var name=formx[i].name.value;
		}
		
		if(name=='')
			$("#error1").html("<font color=red>Please enter name</font>");
		else
			$("#error1").html("");
	}
	if(att=='y'){
		if(document.all){
			formx=document.all.tags("form");
		}else if(document.getElementsByTagName){
			formx=document.getElementsByTagName("form");
		}else if(document.layers){
			formx=document.layers("form");
		}
	
		for(var i=0; i<formx.length; i++){
			var email=formx[i].email.value;
		}
		
		if(email=='')
			$("#error2").html("<font color=red>Please enter email</font>");
		else if((email.indexOf(".") > 3) && (email.indexOf("@") > 1) && (email.length>6)){
			$("#error2").html("");
		}
		else{
			$("#error2").html("<font color=red>Incorrect email format!</font>");
		}
	}
	if(att=='z'){
		if(document.all){
			formx=document.all.tags("form");
		}else if(document.getElementsByTagName){
			formx=document.getElementsByTagName("form");
		}else if(document.layers){
			formx=document.layers("form");
		}
	
		for(var i=0; i<formx.length; i++){
			var inquiry=formx[i].inquiry.value;
		}
		
		if(inquiry=='')
			$("#error3").html("<font color=red>Please enter inquiry</font>");
		else
			$("#error3").html("");
	}
	if(att=='c'){
		if(document.all){
			formx=document.all.tags("form");
		}else if(document.getElementsByTagName){
			formx=document.getElementsByTagName("form");
		}else if(document.layers){
			formx=document.layers("form");
		}
	
		for(var i=0; i<formx.length; i++){
			var phone=formx[i].phone.value;
		}
		
		if(phone=='')
			$("#error6").html("<font color=red>Please enter your phone number</font>");
		else
			$("#error6").html("");
	}
	
}