function showProducts(cat) 
{
document.getElementById('flightPanel').style.display='none';
document.getElementById('hotelPanel').style.display='none';
document.getElementById('carPanel').style.display='none';
document.getElementById('dealsPanel').style.display='none';

panelToShow=cat+'Panel';

document.getElementById(panelToShow).style.display='block';
document.getElementById('flightTab').style.backgroundPosition='top left';
document.getElementById('hotelTab').style.backgroundPosition='top left';
document.getElementById('carTab').style.backgroundPosition='top left';
document.getElementById('dealsTab').style.backgroundPosition='top left';

document.getElementById('flightTab').style.background='url(images/gray_tab.gif)'
document.getElementById('hotelTab').style.background='url(images/gray_tab.gif)'
document.getElementById('carTab').style.background='url(images/gray_tab.gif)'
document.getElementById('dealsTab').style.background='url(images/gray_tab.gif)'

tabToHighlight=cat+'Tab';

document.getElementById(tabToHighlight).style.background='url(images/blue_tab.gif)';
}


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 ID")
		   return false
		}

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

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

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

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

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

 		 return true					
	}

function ValidateForm(){
	var emailID=document.myform.email
	var title=document.myform.name
	var sug=document.myform.textarea
	
	if ((title.value==null)||(title.value=="")){
		alert("Please Enter your Name")
		title.focus()
		return false
	}
	if ((emailID.value==null)||(emailID.value=="")){
		alert("Please Enter your Email ID")
		emailID.focus()
		return false
	}	
	if ((sug.value==null)||(sug.value=="")){
		alert("You cannot send Empty Message.")
		sug.focus()
		return false
	}
	if (echeck(emailID.value)==false){
		emailID.value=""
		emailID.focus()
		return false
	}
	return true
 }