function DOMNode(){};DOMNode.findPrevSibling=function(node,siblingName){var n=siblingName.toUpperCase();for(node=node.previousSibling;node&&node.nodeName!=n;node=node.previousSibling);return node;}
DOMNode.findNextSibling=function(node,siblingName){var n=siblingName.toUpperCase();for(node=node.nextSibling;node&&node.nodeName!=n;node=node.nextSibling);return node;}
DOMNode.findAncestor=function(node,ancestorName){var n=ancestorName.toUpperCase();for(node=node.parentNode;node&&node.nodeName!=n;node=node.parentNode);return node;}
DOMNode.findFirstTextChild=function(elem){while(elem.nodeType!=3&&elem.firstChild){elem=elem.firstChild;}
return(elem.nodeType==3?elem:null);}
DOMNode.truncate=function(elem){for(;elem.firstChild;elem.removeChild(elem.firstChild));}
DOMNode.checkAttribute=function(elem,attribute,value){var attr;if(!elem){return false;}
switch(attribute){case'class':attr=elem.className;break;default:attr=elem.getAttribute(attribute);}
return(attr&&attr.match('\\b'+value+'\\b')==value);}
DOMNode.isClass=function(elem,clazz){return DOMNode.checkAttribute(elem,'class',clazz);}
DOMNode.isRel=function(elem,rel){return DOMNode.checkAttribute(elem,'rel',rel);}
DOMNode.editStyleValue=function(elem,style,value){switch(style){case'cursor':try{elem.style.cursor=value;}catch(e){if(value=='pointer'){elem.style.cursor='hand';}}
break;default:elem.style[style]=value;}}
DOMNode.addClass=function(elem,clazz){for(var i=1;i<arguments.length;i++){if(!DOMNode.isClass(elem,arguments[i])){elem.className=(elem.className?elem.className+' '+arguments[i]:arguments[i]);}}
return elem;}
DOMNode.removeClass=function(elem,clazz){elem.className=elem.className.replace(new RegExp('\\b'+clazz+'\\b'),'');}
DOMNode.getClass=function(elem){return elem.className.split(" ");}
DOMNode.create=function(parent,val,type){var el;if(!type||type=="text"){el=document.createTextNode(val);}else{el=document.createElement(type);if(val){el.appendChild(document.createTextNode(val));}
for(var i=3;i<arguments.length;i++){switch(arguments[i]){case'class':case'className':DOMNode.addClass(el,arguments[++i]);break;case'colspan':el.colSpan=arguments[++i];break;case'style':if(document.all&&!window.opera){el.style.cssText=arguments[++i];break;}
default:el.setAttribute(arguments[i],arguments[++i]);}}
if(typeof DOM2Event!='undefined')DOM2Event.initRegistration(el);}
if(parent){parent.appendChild(el);}
return el;}
DOMNode.appendAfter=function(newEl,sib){if(sib.nextSibling){sib.parentNode.insertBefore(newEl,sib.nextSibling);}else{sib.parentNode.appendChild(newEl);}}
DOMNode.getByTagAndClass=function(base,tagname,className){if(arguments.length<3){throw('DOMNode.getByTagAndClass: insufficient number of arguments');}
return array_grep(base.getElementsByTagName(tagname),(className?function(o){return DOMNode.isClass(o,className);}:function(){return true;}));}
DOMNode.getOffsets=function(el){var xy={x:0,y:0};while(el){xy.x+=el.offsetLeft;xy.y+=el.offsetTop;el=el.offsetParent}
return xy;}