JS uses for Loop traversal child node lookup element _javascript Tips

This article mainly introduced JS use for loop coordinate array traversal child node lookup element

function Nextchildnode (node,clazz,tagname) { 
var count= node.childelementcount; 
for (Var i=0;i<count;i++) { 
if (node==undefined | | node.children[i]==undefined) { 
continue; 
} 
if (clazz) { 
if (Node.children[i].getattribute (' class ') ==clazz) {return 
node.children[i]; 
} 
} else{ 
if (node.children[i].tagname==tagname) {return 
node.children[i]; 
} 
}} return null; 
} 

function Getchildnode (node,classarg,tagnodearg) {for 
(var i=0;i<classarg.length;i++) { 
node= Nextchildnode (Node,classarg[i]); 
for (Var i=0;i<tagnodearg.length;i++) { 
node=nextchildnode (node,null,tagnodearg[i]); 
} 
return node; 
} 

function Getitemid (node) { 
var classnode=[' iteminfo ', ' Itemdesc '],tagnode=[' P ', ' BUTTON ']; 
Node=getchildnode (Node,classnode,tagnode); 
Alert (Node.getattribute (' itemid ')); 

} 

#调用函数