Event implementation code in a dynamically created table cell

CodeAs follows:
VaR tableelem = Document. getelementbyid ("mytable ");
VaR tbodyelem = tableelem. getelementsbytagname ("tbody") [0];
VaR trelem = Document. createelement ("TR ");
VaR TD1 = Document. createelement ("TD ");
Td1.onclick = "editcell ()";

Td1.width = "45% ";
Td1.innertext = "";
Trelem. appendchild (TD1 );
Tbodyelem. appendchild (trelem );
Alert (tbodyelem. innerhtml );

This code dynamically creates a TR and TD, and sets an onclick event in TD. However, when you click TD, The editcell function is called without the start time. Come on, td1.onclick = "editcell ()"; change to td1.attachevent ("onclick", editcell) to successfully call