if(window.screen.availWidth == 1280)window.parent.document.body.style.zoom="90%";
if(window.screen.availWidth == 1024)window.parent.document.body.style.zoom="75%";
if(window.screen.availWidth == 800)window.parent.document.body.style.zoom="60%"; 
if(window.screen.availWidth == 640)window.parent.document.body.style.zoom="50%";