// JavaScript Document
function getElementPosition(elemID) {
    var offsetTrail = document.getElementById(elemID);
    var offsetLeft = 0;
    var offsetTop = 0;
    while (offsetTrail) {
        offsetLeft += offsetTrail.offsetLeft;
        offsetTop += offsetTrail.offsetTop;
        offsetTrail = offsetTrail.offsetParent;
    }
    if (navigator.userAgent.indexOf("Mac") != -1 && 
        typeof document.body.leftMargin != "undefined") {
        offsetLeft += document.body.leftMargin;
        offsetTop += document.body.topMargin;
    }
    return offsetTop;
}
function checkheight(){
var tease_1=getElementPosition('left_box_height');
var tease_2=getElementPosition('middle_box_height');
var tease_3=getElementPosition('right_box_height');
	if((tease_3>=tease_2) && (tease_3>=tease_1)){
	document.getElementById('left_box_height').style.marginTop=eval(tease_3-tease_1)+'px';
	document.getElementById('middle_box_height').style.marginTop=eval(tease_3-tease_2)+'px';
	}
	if((tease_2>=tease_3) && (tease_2>=tease_1)){
	document.getElementById('left_box_height').style.marginTop=eval(tease_2-tease_1)+'px';
	document.getElementById('right_box_height').style.marginTop=eval(tease_2-tease_3)+'px';
	}
	if((tease_1>=tease_3) && (tease_1>=tease_2)){
	document.getElementById('middle_box_height').style.marginTop=eval(tease_1-tease_2)+'px';
	document.getElementById('right_box_height').style.marginTop=eval(tease_1-tease_3)+'px';
	}	
}