jQuery offset 定位 原理

jQuery.noConflict();jQuery(document).ready(showNavigationHr);jQuery(window).resize(showNavigationHr);function showNavigationHr(){ var to = jQuery("#navhr"); var source = getSelectedNavigation(); if(source==null) return null; var width = source.width(); var top = source.offset().top; var left = source.offset().left; try{ to.width(width); var fixTop = 50; to.css("top", top+fixTop); to.css("left", left); }catch(err){ } function getSelectedNavigation(){ var __tabindex = jQuery("#tabindex").html(); if(__tabindex == "") __tabindex ="family_register"; return jQuery("#"+__tabindex); } //for mainws resize to adapt var resizewidth = jQuery("#rightDiv").width() - jQuery("#vmenu").width() - 105; jQuery("#mainws").width(resizewidth);}