js获取元素坐标

//js获取元素坐标 

function getElementPos(elementId) {  
 var ua = navigator.userAgent.toLowerCase();  
 var isOpera = (ua.indexOf('opera') != -1);  
 var isIE = (ua.indexOf('msie') != -1 && !isOpera); // not opera spoof   
 var el = document.getElementById(elementId);  
 if(el.parentNode === null || el.style.display == 'none') {  
  return false;  
 }        
 var parent = null;  
 var pos = [];       
 var box;       
 if(el.getBoundingClientRect)    //IE   
 {           
  box = el.getBoundingClientRect();  
  var scrollTop = Math.max(document.documentElement.scrollTop, document.body.scrollTop);  
  var scrollLeft = Math.max(document.documentElement.scrollLeft, document.body.scrollLeft);  
  return {x:box.left + scrollLeft, y:box.top + scrollTop};  
 }else if(document.getBoxObjectFor)    // gecko       
 {  
  box = document.getBoxObjectFor(el);   
  var borderLeft = (el.style.borderLeftWidth)?parseInt(el.style.borderLeftWidth):0;   
  var borderTop = (el.style.borderTopWidth)?parseInt(el.style.borderTopWidth):0;   
  pos = [box.x - borderLeft, box.y - borderTop];  
 } else    // safari & opera       
 {  
  pos = [el.offsetLeft, el.offsetTop];    
  parent = el.offsetParent;       
  if (parent != el) {   
   while (parent) {    
    pos[0] += parent.offsetLeft;   
    pos[1] += parent.offsetTop;   
    parent = parent.offsetParent;  
   }    
  }     
  if (ua.indexOf('opera') != -1 || ( ua.indexOf('safari') != -1 && el.style.position == 'absolute' )) {   
   pos[0] -= document.body.offsetLeft;  
   pos[1] -= document.body.offsetTop;           
  }      
 }                
 if (el.parentNode) {   
    parent = el.parentNode;  
   } else {  
    parent = null;  
   }  
 while (parent && parent.tagName != 'BODY' && parent.tagName != 'HTML') { // account for any scrolled ancestors   
  pos[0] -= parent.scrollLeft;  
  pos[1] -= parent.scrollTop;  
  if (parent.parentNode) {  
   parent = parent.parentNode;  
  } else {  
   parent = null;  
  }  
 }  
 return {x:pos[0], y:pos[1]};  
}  
  
//sample   
var pos=getElementPos("divId");  
alert("距左边距离"+ pos.x +",距上边距离"+pos.y);  
function getElementPos(elementId) {
 var ua = navigator.userAgent.toLowerCase();
 var isOpera = (ua.indexOf('opera') != -1);
 var isIE = (ua.indexOf('msie') != -1 && !isOpera); // not opera spoof
 var el = document.getElementById(elementId);
 if(el.parentNode === null || el.style.display == 'none') {
  return false;
 }      
 var parent = null;
 var pos = [];     
 var box;     
 if(el.getBoundingClientRect)    //IE
 {         
  box = el.getBoundingClientRect();
  var scrollTop = Math.max(document.documentElement.scrollTop, document.body.scrollTop);
  var scrollLeft = Math.max(document.documentElement.scrollLeft, document.body.scrollLeft);
  return {x:box.left + scrollLeft, y:box.top + scrollTop};
 }else if(document.getBoxObjectFor)    // gecko    
 {
  box = document.getBoxObjectFor(el); 
  var borderLeft = (el.style.borderLeftWidth)?parseInt(el.style.borderLeftWidth):0; 
  var borderTop = (el.style.borderTopWidth)?parseInt(el.style.borderTopWidth):0; 
  pos = [box.x - borderLeft, box.y - borderTop];
 } else    // safari & opera    
 {
  pos = [el.offsetLeft, el.offsetTop];  
  parent = el.offsetParent;     
  if (parent != el) { 
   while (parent) {  
    pos[0] += parent.offsetLeft; 
    pos[1] += parent.offsetTop; 
    parent = parent.offsetParent;
   }  
  }   
  if (ua.indexOf('opera') != -1 || ( ua.indexOf('safari') != -1 && el.style.position == 'absolute' )) { 
   pos[0] -= document.body.offsetLeft;
   pos[1] -= document.body.offsetTop;         
  }    
 }              
 if (el.parentNode) { 
    parent = el.parentNode;
   } else {
    parent = null;
   }
 while (parent && parent.tagName != 'BODY' && parent.tagName != 'HTML') { // account for any scrolled ancestors
  pos[0] -= parent.scrollLeft;
  pos[1] -= parent.scrollTop;
  if (parent.parentNode) {
   parent = parent.parentNode;
  } else {
   parent = null;
  }
 }
 return {x:pos[0], y:pos[1]};
}

//sample
var pos=getElementPos("divId");
alert("距左边距离"+ pos.x +",距上边距离"+pos.y);

 

js获取对象的绝对坐标 
view plaincopy to clipboardprint?function   getAbsPoint(e)     
{     
    var   x   =   e.offsetLeft,   y   =   e.offsetTop;     
    while(e=e.offsetParent)   
    {   
       x   +=   e.offsetLeft;     
       y   +=   e.offsetTop;  
    }   
    alert("x:"+x+","+"y:"+y);     
}  
  
方法2：  
  
function   getAbsPoint(obj)     
{     
   var   x,y;     
   oRect   =   obj.getBoundingClientRect();     
x=oRect.left     
y=oRect.top     
alert("("+x+","+y+")")     
}  
  
JS中获得窗口属性的方法   
  
1。获得屏幕的分辨率：   
screen.width   
screen.height   
  
2。获得窗口大小：   
document.body.clientWidth   
document.body.clientHeight   
  
3。获得窗口大小（包含Border、Scroll等元素）   
document.body.offsetWidth   
document.body.offsetHeight