I think you need to use XMLHttpRequest to load the stylesheet from the server, then you have responseXML, and you can use this with the XSLT transform APIs that browsers open for Javascript (like importStylesheet with Mozilla and transformNode with IE).
IE , XML, ,
<xml id="sheet1" src="sheet.xslt></xml>
HTML. script , . someResponseXML.transformNode(sheet1.XMLDocument).