function toggle(switchElement) {

	var plan_contrib = document.getElementById('contrib');
	plan_contrib.style.display = 'none'; 

//	alert(switchElement.value);
    if (switchElement.value == 'yes')
    	plan_contrib.style.display = 'table-row';
//		document.getElementById('noplan').style.display="none";
    else
    	plan_contrib.style.display = 'none';                
}

function checkform() { 
	var box = document.getElementById('form1').elements;
	var err1st="Error!!! Please fill in these fields:\n";
	var errtxt="";
	for(var i=0; i<box.length; i++){
		if(box[i].name=="firstname"){
			if(box[i].value==""){
				errtxt+="First name\n";
			}
		} else if(box[i].name=="lastname"){
            if(box[i].value==""){
                errtxt+="Last name\n";
            }
        } else if(box[i].name=="institute"){
            if(box[i].value==""){
                errtxt+="Institution\n";
            }
        } else if(box[i].name=="address"){
            if(box[i].value==""){
                errtxt+="Mailing Address\n";
            }
        } else if(box[i].name=="email"){
			if(box[i].value=="")
                errtxt+="Email\n";
        } else if(box[i].name=="cemail"){
            if(box[i].value=="")
                errtxt+="Confirm Email\n";
        }

	}
	
	if(errtxt!=""){
		alert(err1st+errtxt);
		return false;
	} else return true;
}	

function checkform2() {
    var box = document.getElementById('form2').elements;
    var err1st="Error!!! Please check or fill in following fields:\n";
    var errtxt="";
    for(var i=0; i<box.length; i++){
		if(box[i].name=="email"){
            if(box[i].value==""){
                errtxt+="Email\n";
            }
        } else if(box[i].name=="title"){
            if(box[i].value==""){
                errtxt+="Title\n";
            }
        } else if(box[i].name=="authors"){
            if(box[i].value==""){
                errtxt+="Authors\n";
            }
        } else if(box[i].name=="abstract"){
            if(box[i].value==""){
                errtxt+="Abstract\n";
            }
        }
	}
	
	if(errtxt!=""){
        alert(err1st+errtxt);
        return false;
    } else return true;	

}