function detectSize(divSource, divTarget1){
    var sourceDiv = this.document.getElementById(divSource);
    
	//find target div
    var targetDiv1 = document.getElementById(divTarget1);
	
	//check that they won't decrease to prevent rendering issues
    
		//check source greater than threshhold
		if( sourceDiv.offsetHeight > 440 ){
			targetDiv1.style.height = "360px";
			//add a background image to the div at this point
			document.getElementById("divRightColumn").style.background="url(/Images/big_shell_logo.jpg)";
			document.getElementById("divRightColumn").style.backgroundRepeat="no-repeat";
		}

}