if (document.images) {            

	

	btn1a = new Image(); btn1a.src = "/elements/image/cm_sm_b.gif";
	btn1b = new Image(); btn1b.src = "/elements/image/cm_sm_a.gif";
	btn2a = new Image(); btn2a.src = "/elements/image/php_sm_b.gif";
	btn2b = new Image(); btn2b.src = "/elements/image/php_sm_a.gif";
	
    }



function imgA(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "a.src");       
		}
	}

function imgB(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "b.src");        
		}
	}