Create an HTML DOM element dynamically with JS and display it

Recently, due to work needs, need to click on an element, dynamically create a DOM element and display, so wrote some related JS functions, in this record, for memos:

/**/ 
/**/ 
function getElement(obj) 
{ 
return typeof obj=='string'?document.getElementById(obj):obj; 
} 
/**/ 
function getObjectPosition(obj) 
{ 
obj=typeof obj==='string'?getElement(obj):obj; 
if(!obj) 
{ 
return; 
} 
var position=''; 
if(obj.getBoundingClientRect) //For IEs 
{ 
position=obj.getBoundingClientRect(); 
return {x:position.left,y:position.top}; 
} 
else if(document.getBoxObjectFor) 
{ 
position=document.getBoxObjectFor(obj); 
return {x:position.x,y:position.y}; 
} 
else 
{ 
position={x:obj.offsetLeft,y:obj.offsetTop}; 
var parent=obj.offsetParent; 
while(parent) 
{ 
position.x+=obj.offsetLeft; 
position.y+=obj.offsetTop; 
parent=obj.offsetParent; 
} 
return position; 
} 
} 
/**/ 
function addEventHandler(oTarget, sEventType, fnHandler) 
{ 
if (oTarget.addEventListener) 
{ 
oTarget.addEventListener(sEventType, fnHandler, false); 
} 
else if (oTarget.attachEvent) //for IEs 
{ 
oTarget.attachEvent("on" + sEventType, fnHandler); 
} 
else 
{ 
oTarget["on" + sEventType] = fnHandler; 
} 
} 
/**/ 
function removeEventHandler(oTarget,sEventType,fnHandler) 
{ 
if(oTarget.removeEventListener) 
{ 
oTarget.removeEventListener(sEventType,fnHandler,false) 
} 
else if(oTarget.detachEvent) //for IEs 
{ 
oTarget.detachEvent(sEventType,fnHandler); 
} 
else 
{ 
oTarget['on'+sEventType]=undefined; 
} 
} 

/**/ 
function dynCreateDomObject(domParams) 
{ 
if(getElement(domParams.domId)) 
{ 
childNodeAction('remove',domParams.parentNode,domParams.domId); 
} 

var dynObj=document.createElement(domParams.domTag); 

with(dynObj) 
{ 
//Id can also be passed in through otherAttributes, but for the special nature of id, it is still used here
//The JSON object is passed in and attached with the DOM ID attribute
id=domParams.domId; 
innerHTML=domParams.content; //InnerHTML is a DOM attribute, and id and so on are element attributes
} 
/**/ 
if(null!=domParams.otherAttributes) 
{ 
for(var i=0;i<domParams.otherAttributes.length;i++) 
{ 
var otherAttribute =domParams.otherAttributes[i]; 
dynObj.setAttribute(otherAttribute.attrName,otherAttribute.attrValue); 
} 
} 
/**/ 
/**/ 
if(null!=domParams.eventRegisters) 
{ 
for(var i=0;i<domParams.eventRegisters.length;i++) 
{ 
var eventRegister =domParams.eventRegisters[i]; 
addEventHandler(dynObj,eventRegister.eventType,eventRegister.eventHandler); 
} 
} 
/**/ 
try 
{ 
childNodeAction('append',domParams.parentNode,dynObj); 
} 
catch($e) 
{ 

} 

return dynObj; 
} 
/**/ 
function childNodeAction(actionType,parentNode,childNode) 
{ 
if(!parentNode) 
{return; } 


parentNode=typeof parentNode==='string'?getElement(parentNode):parentNode; 
childNode=typeof childNode==='string'?getElement(childNode):childNode; 
if(!parentNode || !childNode) 
{return;} 

var action=actionType.toLowerCase(); 
if( null==actionType || action.length<=0 || action=='append') 
{ 
action='parentNode.appendChild'; 
} 
else 
{ 
action='parentNode.removeChild'; 
} 

try 
{ 
eval(action)(childNode); 
} 
catch($e) 
{ 
alert($e.message); 
} 
} 

Examples of use:

var htmlAttributes= 
[

{attrName:'class',attrValue:' The style name '} //for IEs

,

{attrName:'className',attrValue: ' The style name '} //for ff

] 

var domParams={domTag:'div', content:' dynamic div the innerHTML', otherAttributes:htmlAttributes};

var newHtmlDom=dynCreateDomObject(domParams);

//Through the setAttribute (' style ', 'position: absolute... ')

//The form to specify style has no effect, only through the following form,jiong

newHtmlDom.style.zIndex='8888';

newHtmlDom.style.position='absolute';

newHtmlDom.style.left='100px';

newHtmlDom.style.top='200px';