function validateForm(contact)
{

if(document.forms.contact.name.value=="")
{
alert("Please enter your name!");
return false;
}
var email=document.forms.contact.emailadd
if (echeck(email.value)==false){
		email.value=""
		email.focus()
		return false
	}
	
if(""==document.forms.contact.desc.value)
{
alert("Please provide your brief requirement!");
return false;
}
	
var ph=document.forms.contact.phone
if (isInteger(ph.value)==false){
		alert("Please provide a valid phone number")
		return false;
	}
}

function isInteger(s){
 var i;
    for (i = 0; i < s.length; i++){  
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

// Email validation //
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("Please provide a valid email address!")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Please provide a valid email address!")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Please provide a valid email address!")
		    return false
		}

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

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Please provide a valid email address!")
		    return false
		 }

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

 		 return true					
	}