function checkTrialSelection()
{
 var trial_cat_options=document.getElementsByName('category_type');
	for(i=0;i<trial_cat_options.length;i++)
	  {
	  	if(trial_cat_options[i].checked==true)
		 {
		   if(trial_cat_options[i].value=="C")
		    document.forms[1].action="conditions.php";
		   else if(trial_cat_options[i].value=="I")
		    document.forms[1].action="interventions.php";			   	
		 }
	  }
	 document.forms[1].submit();
	return 1;  
}

 function validate_comments(){
  if(document.getElementById('name').value==''){
   alert('Please Enter Your Name');
   document.getElementById('name').focus();
   return false;
  }else if(document.getElementById('emailid').value==''){
    alert('Please Enter Email Address');
    document.getElementById('emailid').focus();
	return false;
  }else if (echeck(document.getElementById('emailid').value)==false){
		document.getElementById('emailid').value=""
		document.getElementById('emailid').focus()
		return false
  }else if(document.getElementById('comments').value==''){
    alert('Please Enter Comments');
    document.getElementById('comments').focus();
	return false;
  }
  return true;
 }
 
  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 selstar(val)
      {
		for(var x=1;x<=val;x++)
		{
			document['i'+x].src="images/star2.gif";
		}
	
      }
      function remstar(val)
      {
		for(var x=1;x<=val;x++)
		{
			document['i'+x].src="images/star1.gif";
		}
      }

      function setrate(val)
      {
		document.frmRating.rating.value=val;
		document.frmRating.submit();
      }