的升序怎么做？

function taxis(x) { stylesheet=document.XSLDocument; source=document.XMLDocument; sortField=document.XSLDocument.selectSingleNode( "//@order-by ")

; if(x == 'blue_ID ') sortField.value= 'number( '+x+ ') '

; else sortField.value=x; if (this.rel == '+ ') { this.rel = '- '

; } else { sortField.value = '- '+sortField.value; this.rel = '+ '; } Layer1.innerHTML=source.documentElement.transformNode(stylesheet); }